DVIGear DVI-3221a - Manual (Page 3)

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1.0 INTRODUCTION
Thank you for purchasing this VGA Converter / Scaler from DVIGear, Inc.. The DVI-3221a
is designed to convert between a wide variety of PC resolutions, and many HDTV
resolutions. Our professional conversion and scaling products have been serving the
industry for several years. In addition to VGA Converter / Scaler, DVIGear, Inc. offers a full
line of high quality Scan Converters, Standards Converters, DV-to-Analog Converters,
Switchers and Distribution Amplifiers.
1.1 Features
• Ultra Compact, High Performance Units
• Convert PC-to-PC, PC-to-HD, HD-to-PC or HD-to-HD
• Convert RGBHV to/from YPbPr
• PC Resolutions to 1280x1024
• HDTV Scan Resolutions
• 48MB Frame Memory
• Integral Picture Adjustments
• On Screen Display for Setup and Adjustment
• Rugged Metal Case
• Locking DC Power Connector for Security
1.2 Getting the Best Results
There are many factors affecting the quality of results when scaling signals. Some basic
precautions will ensure the best possible performance from your converter/scaler.
• Output display device – The quality of the output signal will depend largely upon
the type and quality of display device used. For instance, some video projectors just
look better than others.
• Using Native Resolution – It is always best to set the output resolution of the scaler
to the native resolution and refresh rate of the display device. This allows our scaler
to do most of the work, which usually results in a superior picture.
• Distance between the VGA Converter / Scaler and the display device – This
plays a major role in the final result. Long distances are possible, but special
measures should be taken in order to avoid cable losses. These include using high
quality (coax-type) cables or adding line amplifiers.
• Output connection cables – Low quality cables are susceptible to interference.
They degrade signal quality due to poor matching and cause elevated noise levels.
Therefore, cables should be of the best quality. Coax-type computer cables are
recommended because of their superior internal shielding characteristics.
• Interference from nearby electrical devices – These can have an adverse effect
on signal quality. For example, an older computer monitor often emits very high
electromagnetic fields that can interfere with the performance of video equipment in
its proximity.